#

#  构建列表 形式 [] 其中元素以“，“隔开
# 列表是有顺序的一组值，顺序是从0开始的
squares = [1, 4, 9, 16, 25]
# name_str = "Mike,Mary,Jan,Jake"
name_list = ["Mike","Mary","Jan","Jack"]
password_data = [123,321,123123,12345]
user_age = [23,23,21,25]

user_data_list = [zihao]
password_list = []
user_age = []
# 既可以让列表分别展示，也可以使用列表之间的嵌套
user_all = [["Mike",123,23],["Mary",321,23],["Jan",123123,21],["Jack",12345,25]]
# 应用： 请取出每一个名字（如取第一个名字）
print(names_str[0])
print(names_list[0])
print(user_age[0])
print(user_all[0])